(+-)-Anabasine → Ammonia dichloromethane

Participants

Reaction Steps

A solution of the product of Example 9 (174 mg), 1,2,3,4,5,6-hexahydro-[2,3′]bipyridinyl (111 mg), and acetic acid (0.05 mL) in DCM (3 mL) was treated with sodium triacetoxyborohydride (240 mg). After 16 h, the resulting mixture was treated with 10% sodium hydroxide (5 mL) and extracted with DCM (3×10 mL). The combined organic phases were dried (sodium sulfate) and evaporated. Chromatography of the residue (1–5% 2 M methanolic ammonia/DCM) gave the title compound as a colorless oil (112 mg). 1H NMR (400 MHz, CDCl3): 8.63 (m, 1H), 8.49 (m, 1H), 7.80 (m, 1H), 7.27 (m, 1H), 7.11 (d, J=8.6 Hz, 2H) 6.80 (d, J=8.6 Hz, 2H), 3.97 (t, J=6.3 Hz, 2H), 3.61 (d, J=13.4 Hz, 1H), 3.13 (m, 1H), 2.97 (m, 1H), 2.79 (d, J=13.4 Hz, 1H), 2.48 (m, 2H), 2.41 (br, 4H), 2.01–1.98 (m, 5H), 2.01–1.89 (m, 3H), 1.82–1.72 (m, 2H) 1.63–1.51 (m, 4H), 1.48–1.39 (m, 2H).

Provenance & Evidence